While 4 Cycle Solution is not a vegetarian product, you can tweak the plan to work for you.

There are actually a couple of sections in the program for vegans and vegetarians.

The first one is on page 21 (page 22 on the PDF) on the Week 1 - 7 Day Carb Depletion Nutrition Manual.

The second one is on page 29 (page 30 on the PDF) in the Weeks 2-4 - Macro-Patterning Nutrition Manual.

It may take a little more effort, but there are more and more substitutions coming out for animal proteins every day. With some slight adjustments you can benefit from the amazing information contained in the 4 Cycle Solution too.